Semiconductor laser light source and laser projector

A laser projector and laser light source technology, applied in the laser field, can solve the problems of affecting the life of the laser system, the method of eliminating speckle is complicated, etc., to achieve the effect of improving the picture quality, improving the viewing experience, and increasing the spectral width
CN110928129AInactive Publication Date: 2020-03-27SICHUAN CHANGHONG ELECTRIC CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN CHANGHONG ELECTRIC CO LTD
Publication Date
2020-03-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to the technical field of laser, and aims to solve the problems that an existing speckle eliminating method is complex and influences the service life of a laser system. A semiconductor laser light source and a laser projector are provided. The semiconductor laser light source comprises a laser diode array and a driving module, the laser diode array comprises at least two laser diode groups with different central wavelengths. Each laser diode group comprises one or more laser diodes with the same central wavelength; the number of the driving modules is the same as that of the laser diode groups; the driving modules are connected with the corresponding laser diode groups; and the driving module is used for providing corresponding driving currents for the correspondinglaser diode groups, so that the difference value of the total light output power of any two laser diode groups in the laser diode array is within a preset range, and the total light output power is the sum of the light output power of all laser diodes in the laser diode groups. The method can effectively reduce speckle contrast.
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Description

Technical field

[0001] The present invention relates to the field of laser technology, in particular to a semiconductor laser light source and a laser projector. Background technique

[0002] With the development of semiconductor laser technology, laser display technology (such as laser TV and laser cinema) using red, green, and blue lasers as light sources has become an important development direction for the next generation of display technology. Compared with traditional light emitting diode (LED) light sources, laser diode (LD) light sources have the following advantages: better monochromaticity, narrower spectral range, higher color saturation; three-color LD light sources cover a wider color gamut, The color reproduction is higher; the life of the light source is longer, up to more than 20,000 hours.

[0003] Due to the strong coherence of the laser, a large number of irregularly distributed shiny spots will appear after scattering in a non-uniform medium or non-smooth surfa...

Claims

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